An alpha particle is equivalent to a nucleus. a .hydrogen b. helium c. lithium d. barium

B. helium

Explanation:

Alpha decay: In this process, alpha particles is emitted when a heavier nuclei decays into lighter nuclei. The alpha particle released has a charge of +2 units.

General representation of an element is given as: where,

Z represents Atomic number

A represents Mass number

X represents the symbol of an element

As the alpha particle has atomic number of 2 and mass number of 4, this is helium nuclei.

h let me think

a plasma is a warm ionized gasoline consisting of approximately equal numbers of definitely charged ions and negatively charged electrons. the characteristics of plasmas are notably unique from the ones of ordinary neutral gases in order that plasmas are considered a awesome "fourth kingdom of remember."